Exercise bar



FIG. 1 is a perspective view of an exercise bar showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side elevational view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is an end elevational view as seen from the left end of FIG. 2; and

FIG. 6 is an end elevational view as seen from the right end of FIG. 2. 

The ornamental design for an exercise bar, substantially as shown and described. 